CVE-2017-9420: Sunnythemes Spiffy Calendar

Medium severity, CVSS 6.1. EPSS: 1.3% chance of exploitation in the next 30 days.

Cross site scripting (XSS) vulnerability in the Spiffy Calendar plugin before 3.3.0 for WordPress allows remote attackers to inject arbitrary JavaScript via the yr parameter.

Affected products

• Sunnythemes Spiffy Calendar: version 1.0.0 only; version 1.0.1 only; version 1.0.2a only; version 1.0.3 only; version 1.1.0 only; version 1.1.1 only; …

Published 2017-06-05. Last modified 2026-06-17.